ATtiny26 Atmel Corporation, ATtiny26 Datasheet - Page 104

• Manufacturer Part Number: ATtiny26
• Manufacturer: Atmel Corporation

Specifications of ATtiny26

• Flash (kbytes): 2 Kbytes
• Pin Count: 20
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 16
• Ext Interrupts: 11
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Twi (i2c): 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 11
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 0.12
• Eeprom (bytes): 128
• Self Program Memory: NO
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 2.7 to 5.5
• Operating Voltage (vcc): 2.7 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 2
• Output Compare Channels: 3
• Pwm Channels: 4
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

ADC Data Register –
ADCL and ADCH
ADLAR = 0
ADLAR = 1
104
ATtiny26(L)
• Bits 2..0 – ADPS2..0: ADC Prescaler Select Bits
These bits determine the division factor between the CK frequency and the input clock to the
ADC.
Table 47. ADC Prescaler Selections
When an ADC conversion is complete, the result is found in these two registers. The ADLAR bit
in ADMUX affect the way the result is read from the registers. If ADLAR is set, the result is left
adjusted. If ADLAR is cleared (default), the result is right adjusted. If the result is left adjusted
and no more than 8-bit precision is required, it is sufficient to read ADCH. Otherwise, ADCL
must be read first, then ADCH.
• ADC9..0: ADC Conversion Result
These bits represent the result from the conversion. For differential channels, this is the absolute
value after gain adjustment, as indicated in Table 46 on page 102. For single ended channels,
$000 represents analog ground, and $3FF represents the selected reference voltage minus one
LSB.
Bit
$05 ($25)
$04 ($24)
Read/Write
Initial Value
Bit
$05 ($25)
$04 ($24)
Read/Write
Initial Value
ADPS2
0
0
0
0
1
1
1
1
ADC7
ADC9
ADC1
15
15
R
R
R
R
–
7
0
0
7
0
0
ADC6
ADC8
ADC0
14
14
R
R
R
R
–
6
0
0
6
0
0
ADPS1
0
0
1
1
0
0
1
1
ADC5
ADC7
13
13
R
R
R
R
–
5
0
0
–
5
0
0
ADC4
ADC6
12
12
R
R
R
R
–
4
0
0
–
4
0
0
ADPS0
0
1
0
1
0
1
0
1
ADC3
ADC5
11
11
R
R
R
R
–
3
0
0
–
3
0
0
ADC2
ADC4
10
10
R
R
R
R
–
2
0
0
–
2
0
0
ADC9
ADC1
ADC3
Division Factor
R
R
R
R
9
1
0
0
9
–
1
0
0
128
16
32
64
2
2
4
8
ADC8
ADC0
ADC2
R
R
R
R
8
0
0
0
8
–
0
0
0
ADCH
ADCL
ADCH
ADCL
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